Cylinder Sleeve 4.300 Bore 7-1/2 OAL 4.270 ID

The MELLING Cylinder Sleeve 4.300 Bore 7-1/2 OAL 4.270 ID is an essential component for engine builders, machine shops, and serious automotive enthusiasts undertaking block reconditioning or displacement increases. This precision-engineered sleeve restores worn cylinder walls to original specifications or allows for overbore applications on cast iron or aluminum blocks.

Whether you're rebuilding a stock engine back to OEM tolerances or creating a custom big-block platform, a quality cylinder sleeve is the foundation of durability and reliable performance. Manufactured by MELLING, a trusted name in engine components for over seven decades, this cylinder sleeve features a 4.300-inch bore diameter and a 4.270-inch inside diameter, providing the exact dimensions needed for proper piston and ring clearance.

The precision fit ensures minimal side-to-side movement while maintaining optimal oil film thickness between the piston rings and cylinder wall. MELLING sleeves are cast from premium material that resists corrosion and wear, critical when exposed to fuel, combustion byproducts, and coolant circulation in long-term service. This sleeve is ideal for street engines, race applications, and vintage or modern block restorations requiring precise bore control.